<!-- eslint-disable vue/multi-word-component-names -->
<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closeable="false">
      </el-alert>
      <!-- 步骤条区 activeIndex - 0 将字符串转换成数字 -->
      <el-steps align-center :space="200" :active="activeIndex - 0" finish-status="success">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form label-position="top" :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <!-- tab栏区域 -->
        <el-tabs @tab-click="tabClicked" v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader expand-trigger="hover" :options="cateList" :props="cateProps" v-model="addForm.goods_cat"
                @change="handleChange">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" v-for="(cb, i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 表示图片要上传的后台API地址 -->
            <el-upload :on-success="handleSuccess" :headers="headerObj" :action="uploadUrl" :on-preview="handlePreview"
              :on-remove="handleRemove" list-type="picture">
              <el-button size="small" type="primary">点击上传</el-button>

            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 父文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce">

            </quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button class="btnAdd" type="primary" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>
<script>
// 导入lodash组件
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: '0',
      // 添加商品的表单验证对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 分类列表
      cateList: [],
      // 分类对象
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 动态参数列表数组
      manyTableData: [],
      // 静态属性列表
      onlyTableData: [],
      // 上传图片的url地址
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 手动添加图片上传组件的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false

    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取商品分类列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败！')
      }
      this.cateList = res.data
      // console.log(res)
    },
    // 级联选择器触发就会变化的函数
    handleChange() {
      // 限定级联选择器的范围  只允许选择第三分类
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 标签页监听函数
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('将离开的标签页是：' + oldActiveName)
      // console.log('新进入的标签页是：' + activeName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    async tabClicked() {
      // console.log(this.activeIndex)
      // 证明访问的是动态参数列表
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          this.$message.error('获取动态列表失败！')
        }
        // console.log('1')
        // console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        // console.log(res.data)
        this.manyTableData = res.data
      }
      if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          this.$message.error('获取静态属性失败！')
        }
        // console.log('1')
        // console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // console.log(file)
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2.从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x =>
        x.pic === filePath)
      // 3.调用数组的splice方法，把图片信息，从pics数组中移除
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm)
    },
    // 监听图片上传的事件
    handleSuccess(response) {
      // console.log(response)
      // 1.拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2.将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // lodash   cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form)

        // 发起请求添加商品
        // 商品的名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', form)

        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }

        this.$message.success('添加商品成功！')
        // 编程式导航
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
.el-cascader {
  width: 300px;
}

.el-checkbox {
  margin: 0 5px 0 0 !important;
}

.previewImg {
  width: 100%;
}

.btnAdd {
  margin: 15px;
}
</style>
